AnalyzerSentence analysis6SpansSentenceパネルヒーターは静かで安全だ。1000 character limitAnalyzeSentenceパネルヒーターは静しずかで安あん全ぜんだ。Span Detailsパネルヒーターpanel heater; panel heatingnounはtopic markergrammar静しずかquiet; silent; slow; unhurried; calm; peacefulna-adjectiveでcontinuative form of the copulagrammar安あん全ぜんsafety; securitynoun, na-adjectiveだ。plain copulagrammar